Which theory of emotion implies that every emotion is associated with a unique physiological reaction?

James-Lange theory

Explanation:

The James Lange theory is considered to be one of the earliest emotion theories in modern psychology. It was developed by Carl Lange and William James independently in the 19th century.

The James-Lange hypothesis states that emotions are the outcomes of physical changes which occurs in the body. According to them, the body responses to the emotional event like sweating or increased heart rate which make up the emotional experience for us.